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<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			#div1{
				width: 1000px;
				height: 500px;
				margin: 0px auto;
				border: 1px solid #783421;
			}
			#div2{
				width: 200px;
				height: 100px;
				/*margin-left: 30px;*/
				margin-right: 10px;
				float: right;
				background-color: antiquewhite;
				border: 1px solid #783421;
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			#div3{
				width: 120px;
				height: 200px;
				/*margin-left: 100px;*/
				margin-right: 20px;
				float: right;
				background-color: beige;
				border: 1px solid #783421;
			}
			#div1_1{
				width:300px;
				height: 400px;
				float: left;
				background-color: aqua;
				border: 1px solid #783421;
			}
			#div1_2{
				width: 700px;
				height:400px;
				float:left;
				background-color: aquamarine;
				border: 1px solid #783421;
				/*position: fixed;*/
			}
		</style>
	</head>
	<body>
		<div id="div1">
			
			<div id="div1_1">
				<div id="div2">
					<p>怎么做背景突出</p>
				</div>
				<div id="div3">
					<p>qiqiqiqiqiqiiqiqiq</p>	
				</div>
			</div>
			<div id="div1_2">
				<p>youceyouce</p>
				<p>右侧</p>
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